TY - JOUR AU - Hencz, Mátyás AU - Biró, Tamás AU - Németh, Károly AU - Szakács, Alexandru AU - Portnyagin, Maxim AU - Cseri, Zoltán AU - Pécskay, Zoltán AU - Szabó, Csaba AU - Müller, Samuel AU - Karátson, Dávid TI - Lithostratigraphy of the ignimbrite-dominated Miocene Bükk Foreland Volcanic Area (Central Europe) JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH J2 - J VOLCANOL GEOTH RES VL - 445 PY - 2024 SN - 0377-0273 DO - 10.1016/j.jvolgeores.2023.107960 UR - https://m2.mtmt.hu/api/publication/34412174 ID - 34412174 N1 - Export Date: 1 January 2024 Correspondence Address: Hencz, M.; ELTE Eötvös Loránd University, Hungary; email: hencz.matyas@epss.hun-ren.hu AB - This study documents the volcanic evolution of the Miocene silicic Bükk Foreland Volcanic Area (BFVA), Northern Hungary (Central Europe) at an event-scale. The BFVA is a deeply eroded and dissected volcanic field dominated by multiple, several 10-m thick, valley-filling silicic ignimbrite units, which are chemically and texturally very similar to each other. Hence, establishing lateral correlation is a real challenge due to the sporadic and small-scale outcrops and lack of stratotypes. Detailed field observations allowed us to identify eleven lithological members including fourteen eruption events and establish a nearly complete lithostratigraphic correlation between fifteen outcrops across the BFVA. Primary pyroclastic material of each member was sampled, and volcanic glass was analyzed for major and trace element composition. The geochemical results confirm the field-based classification of the members and enable the correlation of distinct outcrops. The major and trace element composition of the glassy pyroclasts of each member of the BFVA served as basis to create a field-wide chemical reference database for regional correlational studies. Here, a new lithostratigraphic classification scheme consisting of one formation and eleven members is presented, which reflects the challenges unraveling the stratigraphy of ancient volcanic terrains. The field-based event-scale lithostratigraphy of the BFVA suggests a wet, partly sea-covered depositional environment in the close vicinity of the eruption centers providing favorable conditions to ‘fuel’ silicic explosive phreatomagmatism. On the contrary, paleosol horizons formed after almost each major eruption event or sequence suggests an overall near-coast terrestrial environment for the BFVA, where the emplacement of the pyroclastic material occurred. LA - English DB - MTMT ER - TY - JOUR AU - Seghedi, Ioan AU - Szakács, Alexandru AU - Mirea, Viorel AU - Pécskay, Zoltán AU - Luffi, Péter TI - Volcanic debris avalanche deposits and their significance in the architecture and evolution of the Miocene-Quaternary Călimani-Gurghiu-Harghita volcanic range (Eastern Transylvania, Romania) JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH J2 - J VOLCANOL GEOTH RES VL - 443 PY - 2023 SN - 0377-0273 DO - 10.1016/j.jvolgeores.2023.107932 UR - https://m2.mtmt.hu/api/publication/34207878 ID - 34207878 N1 - Institute of Geodynamics “Sabba S. Ştefănescu”, Romanian Academy, Bucharest, Romania Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary Geological Institute of Romania, Caransebeş str. 1, Bucharest, Romania Export Date: 30 October 2023 Correspondence Address: Ioan, S.; Institute of Geodynamics “Sabba S. Ştefănescu”, Romania; email: seghedi@geodin.ro LA - English DB - MTMT ER - TY - JOUR AU - Rapprich, V. AU - Janousek, V. AU - Hroch, T. AU - Mikova, J. AU - Erban, V. AU - Legesa, F. AU - Pécskay, Zoltán AU - Halodova, P. TI - Eruptive and magmatic evolution of North Chamo Volcanic Field (southern Ethiopia) JF - JOURNAL OF GEOSCIENCES J2 - J GEOSCI VL - 68 PY - 2023 IS - 1 SP - 3 EP - 24 PG - 22 SN - 1802-6222 DO - 10.3190/jgeosci.365 UR - https://m2.mtmt.hu/api/publication/33672504 ID - 33672504 N1 - Czech Geological Survey, Klárov 3, Prague 1118 21, Czech Republic Geological Survey of Ethiopia, Gurd Shola, P.O. Box 2302, Addis Ababa, Ethiopia Isotope Climatology & Environmental Research Centre (Icer) K–Ar Group, Institute for Nuclear Research (ATOMKI), Bem tér 18/c, Debrecen, 4026, Hungary Export Date: 1 January 2024 Correspondence Address: Rapprich, V.; Czech Geological Survey, Klárov 3, Prague 1, Czech Republic; email: vladislav.rapprich@geology.cz AB - A group of pyroclastic cones is dispersed in the North Chamo Volcanic Field, i.e. in the northern surroundings of the Chamo Lake and over neighbouring part of the Nech Sar plains (southern termination of the Main Ethiopian Rift). The activity of scattered cinder cones was partly coeval with that of Tosa Sucha Volcano (Calabrian), but continued also after Tosa Sucha’s extinction until Middle Pleistocene (c. 0.5 Ma). Whereas scoria cones on the Nech Sar plains displayed a rather simple Strombolian eruptive style, the cones located within the northern part of Chamo Lake were characterized by more complex evolution. Ganjulle scoria cone, with a uniform olivine basalt composition, started with a Surtseyan-style eruption, which turned into Strombolian as the volcano grew above the water level. An even more complex history was documented for the Ganta cone. Compositional zoning of pyroclastic rocks is explained by zoned-chamber exhaustion. The transition from magmatic to phreatomagmatic style of the eruption was then most likely linked to syn-eruptive subsidence of the area on the Chamo Lake banks. Subsequent transition back to Strombolian style reflected the growth of the cone above water level.The Sr-Nd-Pb isotopes, together with major-element-based thermodynamic modelling, demonstrate that magmas parental to the North Chamo alkaline volcanic rocks (alkali basalt, through trachybasalt and trachyandesite to trachyte) evolved initially by closed-system fractionation of olivine, later joined by clinopyroxene, spinel and calcic plagioclase. The subsequent stage was characterized by a substantial (c. 25% by mass) assimilation of country-rock felsic igneous material, perhaps corresponding to the Paleogene ignimbrites. LA - English DB - MTMT ER - TY - CHAP AU - Molnár, Ferenc AU - Bajnóczi, Bernadett AU - Pécskay, Zoltán AU - Benkó, Zsolt AU - Prohászka, A ED - Fehér, Béla ED - Molnár, Kata ED - Haranginé Lukács, Réka ED - Czuppon, György ED - Kereskényi, Erika TI - A Velencei-hegység paleogén korú intrúziós-vulkáni rendszerének hidrotermás folyamatai és metallogéniai jelentőségük T2 - Calce et malleo – Mésszel és kalapáccsal PB - Csillagászati és Földtudományi Kutatóközpont CY - Budapest SN - 9789637331008 PY - 2022 SP - 107 EP - 110 PG - 4 UR - https://m2.mtmt.hu/api/publication/33118457 ID - 33118457 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Belak, M AU - Slovenec, D AU - Kolar-Jurkovšek, T AU - Garašić, V AU - Pécskay, Zoltán AU - Tibljaš, D AU - Mišur, I TI - Low-grade metamorphic rocks of the Tethys subduction–collision zone in the Medvednica Mt. (NW Croatia) JF - GEOLOGICA CARPATHICA J2 - GEOL CARPATH VL - 73 PY - 2022 IS - 3 SP - 207 EP - 229 PG - 23 SN - 1335-0552 DO - 10.31577/GeolCarp.73.3.3 UR - https://m2.mtmt.hu/api/publication/33033114 ID - 33033114 N1 - Croatian Geological Survey, Department of Geology, Sachsova 2, Zagreb, HR-10000, Croatia Geological Survey of Slovenia, Dimičeva ulica 14, Ljubljana, SLO-1000, Slovenia University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Pierottijeva 6, Zagreb, HR-10000, Croatia Institute for Nuclear Research, Isotope Climatology and Environmental Research Centre (ICER), K–Ar group, Bem tér 18/c 4026, Debrecen, HU-4030, Hungary University of Zagreb, Faculty of Science, Horvatovac 95, Zagreb, HR-10000, Croatia Export Date: 15 August 2022 Correspondence Address: Belak, M.; Croatian Geological Survey, Sachsova 2, Croatia; email: mirko.belak@hgi-cgs.hr LA - English DB - MTMT ER - TY - JOUR AU - Seghedi, I. AU - Ntaflos, T. AU - Pécskay, Zoltán AU - Panaiotu, C. AU - Mirea, V. AU - Downes, H. TI - Miocene extension and magma generation in the Apuseni Mts. (western Romania): a review JF - INTERNATIONAL GEOLOGY REVIEW J2 - INT GEOL REV VL - 64 PY - 2022 IS - 13 SP - 1885 EP - 1911 PG - 27 SN - 0020-6814 DO - 10.1080/00206814.2021.1962416 UR - https://m2.mtmt.hu/api/publication/32185882 ID - 32185882 N1 - Institute of Geodynamics “Sabba S. Stefănescu”, Romanian Academy, Bucharest, Romania Department Of Lithospheric Research, University Of Vienna, Vienna, Austria Isotope Climatology And Environmental Research Centre (ICER), Institute For Nuclear Research, Hungarian Academy Of Sciences, Debrecen, Hungary Paleomagnetic Laboratory, University Of Bucharest, Bucharest, Romania Department Of Earth And Planetary Sciences, Birkbeck University Of London, London, United Kingdom Export Date: 9 September 2021 Correspondence Address: Seghedi, I.; Institute of Geodynamics ‘Sabba S. Stefănescu’, Jean-Louis Calderon Str., 19-23, Romania; email: seghedi@geodin.ro LA - English DB - MTMT ER - TY - JOUR AU - Hencz, Mátyás AU - Biró, Tamás AU - Kovács, István János AU - Stalder, R. AU - Németh, Károly AU - Szakács, Alexandru AU - Pálos, Zsófia AU - Pécskay, Zoltán AU - Karátson, Dávid TI - Uniform “water” content in quartz phenocrysts from silicic pyroclastic fallout deposits – implications on pre-eruptive conditions JF - EUROPEAN JOURNAL OF MINERALOGY J2 - EUR J MINERAL VL - 33 PY - 2021 IS - 5 SP - 571 EP - 589 PG - 19 SN - 0935-1221 DO - 10.5194/ejm-33-571-2021 UR - https://m2.mtmt.hu/api/publication/32239855 ID - 32239855 LA - English DB - MTMT ER - TY - JOUR AU - Kovacs, M AU - Fülöp, A AU - Seghedi, I AU - Pécskay, Zoltán TI - Architecture of volcanic plumbing systems inferred from thermobarometry: A case study from the Miocene Gutâi Volcanic Zone in the Eastern Carpathians, Romania JF - LITHOS J2 - LITHOS VL - 396-397 PY - 2021 SN - 0024-4937 DO - 10.1016/j.lithos.2021.106191 UR - https://m2.mtmt.hu/api/publication/32016325 ID - 32016325 N1 - Tech. Univ. Cluj-Napoca, North Univ. Centre Baia Mare, Baia Mare, Romania Institute of Geodynamics Sabba S. Ştefănescu, Romanian Academy, Bucharest, Romania Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary Export Date: 28 May 2021 Correspondence Address: Kovacs, M.; Tech. Univ. Cluj-Napoca, Romania; email: marinel.kovacs@cunbm.utcluj.ro LA - English DB - MTMT ER - TY - GEN AU - Biró, Tamás AU - Hencz, Mátyás AU - Németh, Károly AU - Karátson, Dávid AU - Márton Péterné Szalay, Emőke AU - Szakács, Alexandru AU - Bradák, Balázs AU - Szalai, Zoltán AU - Pécskay, Zoltán AU - Kovács, István János TI - Egy Miocén freatopliniuszi kitörés: a "Jató member" fizikai vulkanológiai jellemzői PY - 2021 UR - https://m2.mtmt.hu/api/publication/32014878 ID - 32014878 LA - Hungarian DB - MTMT ER - TY - CONF AU - Hencz, Mátyás AU - Biró, Tamás AU - Cseri, Zoltán AU - Németh, Károly AU - Szakács, Alexandru AU - Márton Péterné Szalay, Emőke AU - Pécskay, Zoltán AU - Karátson, Dávid TI - Egy összetett kitörési eseménysorozat nyomai a Bükkalján (Észak-Magyarország): a Kács Egység T2 - XXII. Bányászati, Kohászati és Földtani Konferencia PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) C1 - Kolozsvár PY - 2021 SP - 71 EP - 75 PG - 5 UR - https://m2.mtmt.hu/api/publication/32014867 ID - 32014867 LA - Hungarian DB - MTMT ER -